UTC 51494
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC 51494 is a monolithic bipolar integrate circuit
that provides both 494 function and built in power good signal
circuit for easy using 51494 can be easily implemented by
just adding a capacitor.
FEATURES
*Fully integrated with compact 16-pin dip
*All necessary functions included for most popular half
bridge circuit.
*Built-in power good delay and power fail lead function.
*Power good delay time is linearly.
*Proportional to external capacitor value.
*Reduced external components for cost down and
components for cost down and compact size.
SOP-16
DIP-16
MAXIMUM RATINGS
(Unless otherwise noted ,all is over operating free-air temperature Range)
CHARACTERISTIC
Supply Voltage
Voltage from any pin to ground (except pin8
& pin11)
Collector Output Voltage
Peak Collector Output
Power dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
Vcc
Vin
Vc1, Vc2
Ic1, Ic2
P
D
Topr
Tsag
RATING
42
Vcc+0.3
42
250
1500
0 to +70
-65 to +150
UNIT
V
V
V
mA
mW
°C
°C
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R103-005,A
UTC 51494
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified , Ta=0~70
°C
,V
CC
=15V,f=10kHz,)
PARAMETER
TEST CONDITIONS
SYMBOL
Reference Section
Reference voltage
Line Regulation
Load Regulation
Temperature Coefficient
Vref
Vline
Viload
Iref =1.0mA
7V<Vcc<40V
1mA<Iref<5mA
0°C <Fa<70°C
C
T
=0.01µF,R
T
=12kΩ
C
T
=0.01µF,R
T
=12kΩ
MIN
4.75
TYP
5
2
1
0.01
10
MAX
5.25
25
15
0.03
UNIT
V
mV
mV
%/°C
Oscillator section
Oscillator Frequency
Oscillator Frequency Change
Over Operating Temperature
Range
Fosc
∆fosc
2
kHz
%
Dead Time Control Section
Input Bias Current ( Pin 4
Maximum Duty cycle,
Each output
Input Threshold Voltage :
Zero Duty
Max Duty
)
Iib(dt)
Dc(max)
Vth
3
0
Vics
Iics
Iib
Vicr
Gvo
fc
Ic(off)
Ie(off)
Vce(sat)
V
CC
=V
C
=40V,V
E
=0
V
CC
=V
C
=40V,V
E
=0
V
E
=15V,Lc=200mA
V3=2.5V
V3=2.5V
V3=2.5V
7V <Vcc< 40V
0.5V < V3 < 3.5V
2
25
0.2
-0.3
60
74
650
2
1.1
100
-100
1.3
10
250
1
Vcc
mV
nA
µA
V
dB
kHz
µA
µA
V
3. 3
V
Vcc =15V ; 0V<V4<5.25V
Vcc = 15V; Pin 4 = 0V
Output Control Pin = Vref
-2
43
-10
45
µA
%
Error Amplifier Section
Input offset Voltage
Input offset Current
Input bias Current
Input Common-mode Voltage
Range
Large Signal Open-Loop Voltage
Range
Unity-Gain Band width
Output Section
Collector off-state current
Emitter off-state Current
Output Saturation Voltage
Common-Emitter
Output Control (pin13)
Standby Power Supply Current
Icc
Tr
Tr
6
100
25
10
200
100
mA
ns
ns
Output AC Characteristic
Raise Time
Common-Emitter
Fall Time
Common-Emitter
PWM Comparator Section
Inhibit Threshold Voltage
Output Source Current
Output Sink Current
Vthi
Io+
Io-
Zero Duty cycle
0.5V < V3 < 3.5V
0.5V < V3 < 3.5V
4
2
-0.2
-0.6
4.5
V
mA
mA
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R103-005,A
UTC 51494
PARAMETER
Power Good Section
Power Good Delay Time
Power Fail Lead Time
Output High Voltage
Output Saturation Voltage
Output Leakage Current
LINEAR INTEGRATED CIRCUIT
SYMBOL
tpd
Tp1
Voh
Vsat
Ioh
TEST CONDITIONS
Cd = 1µ
Cd = 0.47µ
Vpinn = 5V, IL = 1mA
Vpinn = 5V, Isink = 4mA
MIN
230
108
4.75
TYP
280
130
4
MAX
330
160
UNIT
ms
ms
V
V
µA
0.4
100
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NAME
EA1+
EA1-
EA0
DT
CT
RT
GND
C1
GND
Cpg
C2
Vcc
P.G.
Vref
EA2-
EA+
FUNCTION
Error amplifier noninverting input, same as pin 1 of 494
Error amplifier inverting input, same as pin 2 of 494
Error amplifier output and feedback, same as pin 3 of 494
Dead time control input, same as pin 4 of 494
Connect capacitor to oscillator circuit for operating frequency, same as pin 5 of 494
Connect resistor to oscillator circuit for operating frequency, same as pin 6 of 494
Ground terminal of IC, same as pin 7 of 494
Collector of output transistor one, same as pin 8 of 494
Ground terminal of IC
Terminal for capacitor to determine power good delay time
Collector of output transistor two, same as pin 11 of 494
Supply voltage, same as pin 12 of 494
Output for power good signal
Reference voltage output, same as pin 14 of 494
Error amplifier inverting input, same as pin 15 of 494
Error amplifier noninverting input, same as pin 16 of 494
UTC
UNISONIC TECHNOLOGIES CO. LTD
3
QW-R103-005,A
UTC 51494
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
Vcc
Ref Out
GND
R
T
C
T
Dead-Time
Control
Non-inv Input
Inv Input
Non Inv Input
Inv Input
Feed-Back
12
14
7
Reference
Regulator
TF.E
C1
8
C2
11
6
5
Osc
Dead Time
COMPARATOR
+
GND
9
+
4
-
1
2
16
15
3
EA1
+
-
-
PWM
COMPARATOR
-
EA2
+
P.G.
+
-
13
1.25V
10
Cpg
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
QW-R103-005,A
UTC 51494
LINEAR INTEGRATED CIRCUIT
UCC
1.5K
0.01uF
43K
4.7K
4.7K
3
2
1
4
5
0.001U
14
13 12
11
8
51494
6
22K
7
9
0.68U
16
10 15
4.7K
12K
4.7K
2.2K
270
4148
2.2U
100K
150K
-5U
-12
+5
POWER GOOD
UTC
UNISONIC TECHNOLOGIES CO. LTD
5
QW-R103-005,A
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